This material is used with the number rods from the age of three onwards to get acquainted with the numbers 1 to 10 through linked units: each rod corresponds to a number on the corresponding card and the units are clearly shown by the sequence of blue and red segments.
A wooden box with two compartments and a red lid, containing 2 sets of cards in matt coated cardboard with additions and results.
Manufacturer: Montessori BF (Trento, Italy)